21922768553268 has 48 divisors (see below), whose sum is σ = 55804169453760. Its totient is φ = 6643172889600.

The previous prime is 21922768553267. The next prime is 21922768553297. The reversal of 21922768553268 is 86235586722912.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 21922768553199 and 21922768553208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21922768553263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8958238 + ... + 11139818.

It is an arithmetic number, because the mean of its divisors is an integer number (1162586863620).

Almost surely, 2^{21922768553268} is an apocalyptic number.

It is an amenable number.

21922768553268 is an abundant number, since it is smaller than the sum of its proper divisors (33881400900492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21922768553268 is a wasteful number, since it uses less digits than its factorization.

21922768553268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257728 (or 2257726 counting only the distinct ones).

The product of its digits is 174182400, while the sum is 66.

The spelling of 21922768553268 in words is "twenty-one trillion, nine hundred twenty-two billion, seven hundred sixty-eight million, five hundred fifty-three thousand, two hundred sixty-eight".